fix(gnovm): prevent assignment to non-assignable expressions #8820

Job	Run time
Run Main (autocounterd) / Go Linter / lint	35s
Run Main (autocounterd) / Go Test / test	43s
Run Main (docker-integration) / Go Build / generated	8s
Run Main (autocounterd) / Go Build / generated	7s
Run Main (docker-integration) / Go Linter / lint	12s
Run Main (docker-integration) / Go Test / test	14s
Run Main (genproto) / Go Build / generated	10s
Run Main (genproto) / Go Linter / lint	36s
Run Main (genproto) / Go Test / test	36s
Run Main (genstd) / Go Build / generated	5s
Run Main (genstd) / Go Linter / lint	28s
Run Main (genstd) / Go Test / test	27s
Run Main (goscan) / Go Linter / lint	11s
Run Main (goscan) / Go Test / test	21s
Run Main (goscan) / Go Build / generated	9s
Run Main (loop) / Go Build / generated	6s
Run Main (loop) / Go Linter / lint	38s
Run Main (loop) / Go Test / test	46s
	6m 32s

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